Macrocyclic lactone compounds and methods for their use

ABSTRACT

The present invention provides a pharmaceutical composition comprising a pharmaceutically acceptable excipient and a compound of the formula: 
     
       
         
         
             
             
         
       
     
     wherein R 1 , R 2 , R 3 , R 5 , R 6  and R 8  are each independently a member selected from the group consisting of H, C 1-6  alkyl and OH; R 4 , R 7  and R 9  are each independently selected from the group consisting of C 1-6  alkoxy and OH; R 10  is a member selected from the group consisting of H, —OH, —OP(O)Me 2 , 
     
       
         
         
             
             
         
       
     
     —O—(CH 2 ) n —OH and —O—(CH 2 ) m —O—(CH 2 ) o —CH 3 , wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; each of L 1  and L 4  are independently selected from the group consisting of: 
     
       
         
         
             
             
         
       
     
     each of L 2  and L 3  are independently selected from the group consisting of: 
     
       
         
         
             
             
         
       
     
     and
 
salts, hydrates, isomers, metabolites and prodrugs thereof.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 11/854,312, filed Sep. 12, 2007, which claims the benefit of U.S. Provisional Application No. 60/825,531, filed Sep. 13, 2006, the full disclosures of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to structures of demethyl, hydroxyl, demethylhydroxyl and epoxide macrocyclic lactones, their synthesis, pharmaceutical compositions and use for systemic and site specific therapeutic applications.

BACKGROUND

Rapamycin (Sirolimus) is a 31-member natural macrocyclic lactone [C51H79N1O13; MWt=914.2] produced by Streptomyces hygroscopicus and found in the 1970s (U.S. Pat. No. 3,929,992; U.S. Pat. No. 3,993,749). Rapamycin (structure shown below) was approved by the Food and Drug Administration (FDA) for the prophylaxis of renal transplant rejection in 1999.

Rapamycin resembles tacrolimus (binds to the same intracellular binding protein or immunophilin known as FKBP-12) but differs in its mechanism of action. Whereas tacrolimus and cyclosporine inhibit T-cell activation by blocking lymphokine (e.g., IL2) gene transcription, sirolimus inhibits T-cell activation and T lymphocyte proliferation by binding to mammalian target of rapamycin (mTOR). Rapamycin can act in synergy with cyclosporine or tacrolimus in suppressing the immune system.

Rapamycin is also useful in preventing or treating systemic lupus erythematosus [U.S. Pat. No. 5,078,999], pulmonary inflammation [U.S. Pat. No. 5,080,899], insulin dependent diabetes mellitus [U.S. Pat. No. 5,321,009], skin disorders, such as psoriasis [U.S. Pat. No. 5,286,730], bowel disorders [U.S. Pat. No. 5,286,731], smooth muscle cell proliferation and intimal thickening following vascular injury [U.S. Pat. Nos. 5,288,711 and 5,516,781], adult T-cell leukemia/lymphoma [European Patent Application 525,960 A1], ocular inflammation [U.S. Pat. No. 5,387,589], malignant carcinomas [U.S. Pat. No. 5,206,018], cardiac inflammatory disease [U.S. Pat. No. 5,496,832], anemia [U.S. Pat. No. 5,561,138] and increase neurite outgrowth [Parker, E. M. et al, Neuropharmacology 39, 1913-1919, 2000].

Although rapamycin can be used to treat various disease conditions, the utility of the compound as a pharmaceutical drug has been restricted by its very low and variable bioavailability and its high immunosuppressive potency and potential high toxicity. Also, rapamycin is only very slightly soluble in water. To overcome these problems, prodrugs and analogues of the compound have been synthesized. Water soluble prodrugs prepared by derivatizing rapamycin positions 31 and 42 (formerly positions 28 and 40) of the rapamycin structure to form glycinate, propionate, and pyrrolidino butyrate prodrugs have been described (U.S. Pat. No. 4,650,803). Some of the analogues of rapamycin described in the art include monoacyl and diacyl analogues (U.S. Pat. No. 4,316,885), acetal analogues (U.S. Pat. No. 5,151,413), silyl ethers (U.S. Pat. No. 5,120,842), hydroxyesters (U.S. Pat. No. 5,362,718), as well as alkyl, aryl, alkenyl, and alkynyl analogues (U.S. Pat. Nos. 5,665,772; 5,258,389; 6,384,046; WO 97/35575).

Prodrugs and analogues of rapamycin are synthesized by chemical synthesis, where additional synthetic steps are required to protect and deprotect certain positions. Analogues can also be synthesized biologically, where the Streptomyces strain is genetically modified to produce these analogues of rapamycin. The analogues need to maintain necessary positions for protein binding or other cellular interactions and not generate steric hindrance in order to preserve its activity. The safety of these analogues requires extensively testing by series of preclinical and clinical experimentations.

The present invention comprises novel macrocyclic lactones and novel uses for macrocyclic lactones, where the compositions can be synthesized chemically or biologically and which preserve at least some immunosuppressive, anti-proliferative, anti-fungal and anti-tumor properties for use in systemic and site specific applications.

BRIEF SUMMARY OF THE INVENTION

In one embodiment, the present invention provides a pharmaceutical composition comprising a pharmaceutically acceptable excipient and a compound of the formula:

wherein R¹, R², R³, R⁵, R⁶ and R⁸ are each independently a member selected from the group consisting of H, C₁₋₆ alkyl and OH; R⁴, R⁷ and R⁹ are each independently selected from the group consisting of C₁₋₆ alkoxy and OH; R¹⁰ is a member selected from the group consisting of H, —OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃, wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; each of L¹ and L⁴ are independently selected from the group consisting of:

each of L² and L³ are independently selected from the group consisting of:

and salts, hydrates, isomers, metabolites and prodrugs thereof.

In a second embodiment, the present invention provides a device for intracorporeal use, the device comprising an implant; and at least one source of a compound of the present invention.

In a third embodiment, the present invention provides a method of inhibiting cell proliferation by administering to a subject in need thereof, a therapeutically effective amount of a compound of the present invention.

In a fourth embodiment, the present invention provides macrocyclic lactone compounds of the following formula:

wherein R¹, R², R³, R⁵, R⁶, and R⁸ are each independently a member selected from the group consisting of H, C₁₋₆ alkyl and OH; R⁴, R⁷ and R⁹ are each independently selected from the group consisting of C₁₋₆ alkoxy and OH; R¹⁰ is a member selected from the group consisting of H, —OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃, wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; each of L¹ and L⁴ are independently selected from the group consisting of:

each of L² and L³ are independently selected from the group consisting of:

with the proviso that when R¹, R⁶ and R⁸ are Me, R³ and R⁵ are H, R⁴, R⁷ and R⁹ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R² is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁷ and R⁹ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R⁴ is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁴ and R⁷ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R⁹ is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁴, R⁷ and R⁹ are OMe, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R¹⁰ is other than OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃; and salts, hydrates, isomers, metabolites and prodrugs thereof.

In a fifth embodiment, the present invention provides a method of making a compound of the present invention, the method comprising contacting a macrocyclic lactone with an acid to replace an alkoxy group with a nucleophile, thereby making a compound of the present invention.

In a sixth embodiment, the present invention provides a method of making a compound of the present invention, the method comprising contacting a macrocyclic lactone with an epoxidation agent to modify an alkene group to an epoxide, thereby making a compound of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the structure of macrocyclic lactones with some potential sites for chemical modifications to provide compounds of the present invention. Areas marked with a square are sites for demethylation, and areas marked by A circle are sites for hydroxylation and C═C sites (C17=C18, C19=C20=, C21=C22, C29=C30) are sites for epoxidation.

FIG. 2A-2AZ shows compounds of the present invention.

FIG. 3 shows an example of stent configuration having an expandable structure.

FIG. 4 shows a preparative HPLC chromatogram of Compound AR.

FIG. 5 shows a Proton-NMR spectra of Compound AR.

FIG. 6 shows results of liquid chromatography and mass spectra of Compound AR.

FIG. 7( a) shows an analytical HPLC chromatogram of Compound AR.

FIG. 7( b) shows an analytical HPLC chromatogram of Compound AR with isomers.

FIG. 8 shows percentage proliferation of human smooth muscle cells after exposure to varying concentrations of rapamycin and Compound AR.

FIG. 9 shows quantitative coronary angiography (QCA) stenosis of the Compound AR eluting stent as compared to rapamycin eluting Cypher stent after 28 day implantation in a porcine coronary artery model.

FIG. 10 shows tissue concentration of Compound AR at different time points in a porcine coronary artery model.

FIG. 11 shows percentage of Compound AR released from the stent in a porcine coronary artery model.

FIG. 12( a) shows inhibition of IL-6, MMP-9 and MCP-1 released by activated macrophages by exposure to macrocyclic lactone Compound AR and Sirolimus at 10 nM concentration.

FIG. 12( b) shows inhibition of IL-10 released by activated macrophages by exposure to macrocyclic lactone Compound AR and Sirolimus at 10 nM concentration

FIG. 13 shows percentage proliferation of human smooth muscle cells after exposure to varying concentrations of 17,18-29,30-bis-epoxide macrocyclic lactone and Compound AR.

FIG. 14 shows the synthesis of 16-O-demethyl macrocyclic lactone of the present invention.

FIG. 15 shows synthesis of 19, 20 bis-hydroxy macrocyclic lactone.

FIG. 16 shows synthesis of 17,18-29,30-bis epoxide macrocyclic lactone.

DETAILED DESCRIPTION OF THE INVENTION I. Definitions

As used herein, the term “acid” refers to any chemical compound that, when dissolved in water, gives a solution with a pH less than 7.0. Acids are generally described as a compound which donates a hydrogen ion (H+) (Bronsted-Lowry) or as an electron-pair acceptor (Lewis acid). Acids useful in the present invention include, but are not limited to, HCl, H₂SO₄, HNO₃ and acetic acid. One of skill in the art will appreciate that other acids are useful in the present invention.

As used herein, “administering” refers to systemic and local administration or a combination thereof such as oral administration, administration as a suppository, topical contact, parenteral, intravascular, intravenous, intraperitoneal, intramuscular, intralesional, intranasal, pulmonary, mucosal, transdermal, subcutaneous administration, intrathecal administration, delivery through a temporary device such as catheter, porous balloon, delivery through implant such as osmotic pump, prosthesis such as drug eluting stents or others to the subject. One of skill in the art will appreciate that other modes and methods of administering the compounds of the present invention are useful in the present invention.

As used herein, the term “alkoxy” refers to alkyl with the inclusion of an oxygen atom, for example, methoxy, ethoxy, etc. “Halo-substituted-alkoxy” is as defined for alkoxy where some or all of the hydrogen atoms are substituted with halogen atoms. For example, halo-substituted-alkoxy includes trifluoromethoxy, etc. One of skill in the art will appreciate that other alkoxy groups are useful in the present invention.

As used herein, the term “alkyl” refers to a straight or branched, saturated, aliphatic radical having the number of carbon atoms indicated. For example, C₁-C₆ alkyl includes, but is not limited to, methyl, ethyl, propyl, butyl, pentyl, hexyl, iso-propyl, iso-butyl, sec-butyl, tert-butyl, etc. One of skill in the art will appreciate that other alkyl groups are useful in the present invention.

As used herein, the term “body lumen” refers to the lining or cavity of an artery, vein or an organ.

As used herein, the term “contacting” refers to the process of bringing into contact at least two distinct species such that they can react. It should be appreciated, however, that the resulting reaction product can be produced directly from a reaction between the added reagents or from an intermediate from one or more of the added reagents which can be produced in the reaction mixture.

As used herein, the term “hydrate” refers to a compound that is complexed to at least one water molecule. The compounds of the present invention can be complexed with from 1 to 100 water molecules.

As used herein, the term “implant” refers to a medical device inserted into a body in order to treat a condition. Implants include, but are not limited to, drug-eluting devices.

As used herein, the terms “inhibition”, “inhibits” and “inhibitor” refer to a compound that prohibits, reduces, diminishes or lessens, or to a method of prohibiting, reducing, diminishing or lessening a specific action or function.

As used herein, the term “intracorporeal” refers to an mammalian body.

As used herein, the term “isomer” refers to compounds of the present invention that possess asymmetric carbon atoms (optical centers) or double bonds, the racemates, diastereomers, enantiomers, geometric isomers, structural isomers and individual isomers are all intended to be encompassed within the scope of the present invention.

As used herein, the term “organ” refers to any organ of a mammal, such as, but not limited to, heart, lungs, brain, eye, stomach, spleen, bones, pancreas, kidneys, liver, intestines, uterus, colon, ovary, blood, skin, muscle, tissue, prostate, mammary and bladder. One of skill in the art will appreciate that other organs are useful in the present invention.

As used herein, the term “peracid” refers to an acid in which an acidic —OH group has been replaced by an —OOH group. Peracids can be peroxy-carboxylic acids of the formula R—C(O)—OOH, where the R group can be groups such as H, alkyl, alkene or aryl. Peracids include, but are not limited to, peroxy-acetic acid and meta-chloro-peroxybenzoic acid (MCPBA). One of skill in the art will appreciate that other peracids are useful in the present invention.

As used herein, the term “peroxide” refers to a compound containing an oxygen-oxygen single bond. Examples of peroxides include, but are not limited to, hydrogen peroxide. One of skill in the art will appreciate that other peroxides are useful in the present invention.

As used herein, the term “pharmaceutically acceptable excipient” refers to a substance that aids the administration of an active agent to and absorption by a subject. Pharmaceutical excipients useful in the present invention include, but are not limited to, polymers, solvents, antioxidants, binders, fillers, disintegrants, lubricants, coatings, sweeteners, flavors, stabilizers, colorants, metals, ceramics and semi-metals. See below for additional discussion of pharmaceutically acceptable excipients. One of skill in the art will recognize that other pharmaceutical excipients are useful in the present invention.

As used herein, the term “polymer” refers to a molecule composed of repeating structural units, or monomers, connected by covalent chemical bonds. Polymers useful in the present invention are described below. One of skill in the art will appreciate that other polymers are useful in the present invention.

As used herein, the term “prodrug” refers to compounds which are capable of releasing the active agent of the methods of the present invention, when the prodrug is administered to a mammalian subject. Release of the active ingredient occurs in vivo. Prodrugs can be prepared by techniques known to one skilled in the art. These techniques generally modify appropriate functional groups in a given compound. These modified functional groups however regenerate original functional groups by routine manipulation or in vivo. Prodrugs of the active agents of the present invention include active agents wherein a hydroxy, amidino, guanidino, amino, carboxylic or a similar group is modified.

As used herein, the term “salt” refers to acid or base salts of the compounds used in the methods of the present invention. Illustrative examples of pharmaceutically acceptable salts are mineral acid (hydrochloric acid, hydrobromic acid, phosphoric acid, and the like) salts, organic acid (acetic acid, propionic acid, glutamic acid, citric acid and the like) salts, quaternary ammonium (methyl iodide, ethyl iodide, and the like) salts. Additional information on suitable pharmaceutically acceptable salts can be found in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., 1985, which is incorporated herein by reference.

Pharmaceutically acceptable salts of the acidic compounds of the present invention are salts formed with bases, namely cationic salts such as alkali and alkaline earth metal salts, such as sodium, lithium, potassium, calcium, magnesium, as well as ammonium salts, such as ammonium, trimethyl-ammonium, diethylammonium, and tris-(hydroxymethyl)-methyl-ammonium salts.

Similarly acid addition salts, such as of mineral acids, organic carboxylic and organic sulfonic acids, e.g., hydrochloric acid, methanesulfonic acid, maleic acid, are also possible provided a basic group, such as pyridyl, constitutes part of the structure.

The neutral forms of the compounds may be regenerated by contacting the salt with a base or acid and isolating the parent compound in the conventional manner. The parent form of the compound differs from the various salt forms in certain physical properties, such as solubility in polar solvents, but otherwise the salts are equivalent to the parent form of the compound for the purposes of the present invention.

As used herein, the term “source” refers to a location on the device of the present invention providing a supply of the compound of the present invention or a supply of a therapeutic agent. The device of the present invention can have more than one source, such as a first and second. Each source can have a different compound and composition and be used to treat a different indication.

As used herein, the term “subject” refers to animals such as mammals, including, but not limited to, primates (e.g., humans), cows, sheep, goats, horses, pigs, dogs, cats, rabbits, rats, mice and the like. In certain embodiments, the subject is a human.

As used herein, the term “therapeutic agent” refers to any agent, compound or biological molecule that has a therapeutic effect on the patient to whom the therapeutic agent is administered.

As used herein, the terms “therapeutically effective amount or dose” or “therapeutically sufficient amount or dose” or “effective or sufficient amount or dose” refer to a dose that produces therapeutic effects for which it is administered. The exact dose will depend on the purpose of the treatment, and will be ascertainable by one skilled in the art using known techniques (see, e.g., Lieberman, Pharmaceutical Dosage Forms (vols. 1-3, 1992); Lloyd, The Art, Science and Technology of Pharmaceutical Compounding (1999); Pickar, Dosage Calculations (1999); and Remington: The Science and Practice of Pharmacy, 20th Edition, 2003, Gennaro, Ed., Lippincott, Williams & Wilkins). In sensitized cells, the therapeutically effective dose can often be lower than the conventional therapeutically effective dose for non-sensitized cells.

As used herein, the term “vascular prosthesis” refers to a prosthesis for the circulatory system of a mammal.

II. Compounds of the Present Invention

Macrocyclic lactones, their salts, prodrugs, and isomers will be referred to collectively as “macrocyclic lactones” in this invention.

The compounds of the present invention are macrocyclic lactone compounds of the following formula:

wherein R¹, R², R³, R⁵, R⁶ and R⁸ are each independently a member selected from the group consisting of H, C₁₋₆ alkyl and OH; R⁴, R⁷ and R⁹ are each independently selected from the group consisting of C₁₋₆ alkoxy and OH; R¹⁰ is a member selected from the group consisting of H, —OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃, wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; each of L¹ and L⁴ are independently selected from the group consisting of:

each of L² and L³ are independently selected from the group consisting of:

with the proviso that when R¹, R⁶ and R⁸ are Me, R³ and R⁵ are H, R⁴, R⁷ and R⁹ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R² is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁷ and R⁹ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R⁴ is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁴ and R⁷ are OMe, R¹⁰ is OH, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R⁹ is other than OH; with the proviso that when R¹, R⁶ and R⁸ are Me, R², R³ and R⁵ are H, R⁴, R⁷ and R⁹ are OMe, L² and L³ are —CH═CH—, and L¹ and L⁴ are

R¹⁰ is other than OH, —OP(O)Me₂

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃; and salts, hydrates, isomers, metabolites and prodrugs thereof.

In some embodiments, R¹⁰ is

In some other embodiments, R¹⁰ is

In other embodiments, R¹⁰ is —OP(O)Me₂. In still other embodiments, R¹⁰ is

In another embodiment, R¹⁰ is

In a further embodiment, the compound is a compound of FIG. 2. In other embodiments, at least one of R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸ and R⁹ is OH. In still other embodiments, R⁴ is OH.

The invention provides macrocyclic lactone compounds which are described in detail with Formula IA, IB and IC.

In one embodiment, the composition contains macrocyclic lactones which include hydroxy, demethyl, hydroxydemethyl and epoxide macrocyclic lactones.

The structure of certain macrocyclic lactones with some potential sites for chemical modifications to provide compounds of the present invention is shown below.

wherein R¹⁰ is a member selected from the group consisting of —OH,

—OP(O)Me₂, —R^(a)OH, where R^(a) is alkyl, such as —(CH₂)₂ to (CH₂)₇ and —R^(b)OR^(c), where R^(b) is C₂₋₆ alkylene and R^(c) is C₁₋₅ alkyl, such as 40-O-(ethoxyethyl) rapamycin.

In some embodiments, the compounds of the present invention include certain demethyl macrocyclic lactones, such as 16-O-demethyl macrocyclic lactone, 39-O-demethyl macrocyclic lactone, 27-O-demethyl macrocyclic lactone, 16,27-bis-O-demethyl macrocyclic lactone, 27,39-bis-O-demethyl macrocyclic lactone, 16,39-bis-O-demethyl macrocyclic lactone, individually or in combination with each other, as shown in Formula IA.

Formula IA

wherein Each of R⁴, R⁷ and R⁹ are selected from the group of consisting of —OCH₃ and —OH. R⁴ and R⁷ are both, independently, selected from the group of consisting of —OH and —OCH₃.

R⁷ and R⁹ are both, independently, selected from the group of consisting of —OH and —OCH₃.

R⁴ and R⁹ are both, independently, selected from the group of consisting of —OH and —OCH₃. R⁴, R⁷ and R⁹ are each, independently, selected from the group of consisting of —OH and —OCH₃.

And wherein R¹⁰ is as described above.

In another embodiment, the compounds of the present invention includes compositions of hydroxyl macrocyclic lactone, such as 11-hydroxyl macrocyclic lactone, 12-hydroxyl macrocyclic lactone, 14-hydroxyl macrocyclic lactone, 24-hydroxyl macrocyclic lactone, 25-hydroxyl macrocyclic lactone, 35-hydroxyl macrocyclic lactone, individually or in combination with each other, as shown in Formula IB.

Formula IB

wherein Each of R¹, R⁶ and R⁸ are selected from the group of consisting of —CH₃ and —OH. Each of R², R³ and R⁵ are selected from the group of consisting of —H and —OH.

And wherein R¹⁰ is as described above.

In another embodiment, the compounds of the present invention include compositions of epoxide macrocyclic lactone, such as 19, 20-21, 22-29, 30 tris epoxide macrocyclic lactone, 17, 18-19, 20-21, 22 tris epoxide macrocyclic lactone and 17, 18-29, 30 bis epoxide macrocyclic lactone, as shown in Formula IC.

Formula IC

And wherein R¹⁰ is as described above.

In another embodiment, the compounds of the present invention are a combination of Formula IA and Formula IB, including composition of demethylhydroxy macrocyclic lactone such as 14-hydroxy-39-O-demethyl macrocyclic lactone, 16,39-bis-O-demethyl-24-hydroxy macrocyclic lactone, 16,27-bis-O-demethyl-24-hydroxy macrocyclic lactone, 27,39-bis-O-demethyl-24-hydroxy macrocyclic lactone individually or in combination with each other.

In another embodiment, the compounds of the present invention are a combination of Formula IA and Formula IC, including composition of epoxide demethyl macrocyclic lactone such as 17,18-19,20-bis-epoxide-16-O-demethyl macrocyclic lactone, 17,18-29,30-bis-epoxide-16-O-demethyl macrocyclic lactone, individually or in combination with each other.

In yet another embodiment, the compounds of the present invention are a combination of Formula IA, Formula IB and Formula IC, including composition of epoxide demethylhydroxyl macrocyclic lactone such as 17,18-19,20-bis-epoxide-16-O-demethyl-24-hydroxy-macrocyclic lactone, 17,18-29,30-bis-epoxide-16-O-demethyl-24-hydroxy-macrocyclic lactone, individually or in combination with each other.

This invention also covers the compositions of hydrates, salts, isomers, prodrugs, metabolites and derivatives of compounds of the present invention of Formula IA, IB and IC.

Structures of preferred embodiments (A,B,C, . . . AA,AB,AC, . . . AX,AY,AZ) amongst compounds of the present invention of Formula IA, IB and IC and their combinations are shown in Table 1, along with some in FIG. 2A-2AZ.

(

include both sterocenter:

and

)

TABLE 1 Table of preferred compounds.

L¹ L⁴       *     R¹ Me     R² H     R³ H     R⁴ OMe     R⁵ H     R⁶ Me     R⁷ OMe     R⁸ Me     R⁹ OMe   R¹⁰ OH

  L²

  L³

A OH B OH C OH D OH E OH F OH G OH H

I OH

J OH

K OH

L OH

M OH

N OH

O OH

P OH

Q OH

R OH

S OH

T OH

U OH

V OH

W OH —OP(O)Me₂ X OH —OP(O)Me₂ Y OH —OP(O)Me₂ Z OH —OP(O)Me₂ AA OH —OP(O)Me₂ AB OH —OP(O)Me₂ AC OH —OP(O)Me₂ AD OH OH AE OH

AF OH

AG OH

AH OH

AI OH

AJ

AK OH OH

AL OH H—(CH₂CH₂O)₂— AM OH H—(CH₂CH₂O)₂— AN OH H—(CH₂CH₂O)₂— AO OH H—(CH₂CH₂O)₂— AP OH H—(CH₂CH₂O)₂— AQ OH H—(CH₂CH₂O)₂— AR OH AS

AT OH

AU OH

AV OH

AW OH OH

AX OH OH

AY

AZ

* Rapamycin. All —OH substitutions represent a mixture of both the R and the S isomer.

In some embodiments, the compound of the present invention has the following structure:

This invention covers compounds in which the stereochemistry of the 16-position is racemic (R,S) as well as the individual R and S stereoisomers at the 16-position and all other isomers of the compound.

The invention covers compounds with different polymorphic forms. This includes 16-O-demethyl macrocyclic lactone having different polymorphic forms. For example, different polymorph form of 16-O-demethyl macrocyclic lactone is obtained from using dichloromethylene and from using a mixture of methanol and water

There have been different numbering schemes proposed for macrocyclic lactones. To avoid confusion, when specific macrocyclic lactones are named herein, the names are given with reference to macrocyclic lactone using the numbering scheme of the above chemical formula. This invention also covers all the macrocyclic lactones which have different name due to a different numbering scheme if the same functional group exists in the same location within the chemical structure. For example, 39-O-demethyl macrocyclic lactone is the same compound as 41-O-demethyl macrocyclic lactone and 16-O-demethyl macrocyclic lactone is the same compound as 7-O-demethyl macrocyclic lactone.

The compounds of the present invention can be prepared by a variety of methods. In some embodiments, the compounds of the present invention are synthesized biologically by genetically modifying the strains of organisms to produce the compounds of the present invention or by other means.

In another embodiment the compounds of the present invention are prepared using chemical synthesis. Chemical synthesis of the compounds of the present invention can utilize the 17-18, 19-20, 21-22 triene structure in macrocyclic lactones, which facilitates the acid catalyzed nucleophilic substitution of the C 16 methoxy group and allows the introduction of a number of different substitutions and allows the selective manipulation of macrocyclic lactone effector domain. The C16 methoxy group in macrocyclic lactones is manipulated towards acidic reagents to produce the compounds of the present invention. For example, replacement of C 16 methoxy groups with different nucleophiles such as alcohols, thiols and electron rich aromatic groups can be accomplished. This method of synthesis can be performed without protection and deprotection steps.

The method of synthesis of using acidic reagents with compounds having triene functional groups can be applied to other compounds having triene functional groups to synthesize corresponding compound analogues providing a method of synthesis without protection and deprotection steps

In some embodiments, the present invention provides a method of making a compound of the present invention, the method comprising contacting a macrocyclic lactone with an acid to replace an alkoxy group with a nucleophile, thereby making a compound of the present invention. In some other embodiments, the macrocyclic lactone is rapamycin. In other embodiments, the nucleophile is a member selected from the group consisting of —OH, —SH and electron rich aromatic groups. One of skill in the art will appreciate that other methods are useful for preparing the compounds of the present invention.

Synthesis of demethyl macrocyclic lactone is provided in FIG. 14 using 16-O-demethyl macrocyclic lactone as an example. Synthesis of hydroxy macrocyclic lactone is provided in FIG. 15 using 19, 20 bis-hydroxy macrocyclic lactone as an example. Synthesis of epoxide macrocyclic lactone is provided in FIG. 16 using 17,18-29,30-bis epoxide macrocyclic lactone as an example.

In another embodiment, the present invention provides a method of making a compound of the present invention, the method comprising contacting a macrocyclic lactone with a suitable agent such as a peracid or peroxide, to modify an alkene group to an epoxide, thereby making a compound of the present invention. Peracids useful in the methods of the present invention include, but are not limited to, peroxy-carboxylic acids of the formula R—C(O)—OOH, where the R group can be groups such as H, alkyl, alkene or aryl. In some embodiments, the peracid can be peroxy-acetic acid or meta-chloro-peroxybenzoic acid (MCPBA). Peroxides useful in the methods of the present invention include, but are not limited to, hydrogen peroxide. One of skill in the art will appreciate that other epoxidation reagents are useful in the present invention.

The compounds of the present invention are optionally deuterated.

In some embodiments, the present invention provides compounds of the present invention which have a similar potency to the corresponding parent macrocyclic lactone. In another embodiment, the present invention provides compounds of the present invention which are less potent than the corresponding parent macrocyclic lactone in order to improve the safety profile of the compounds.

III. Delivery of the Compounds of the Present Invention

The compounds of the present invention can be administered in any appropriate manner. In some embodiments, the compounds are administered orally, intramuscularly, intraperitoneally, subcutaneously, pulmonarily, mucosally, transdermally, intravascularly and others. In other embodiments, the compounds are administered site specifically through temporary or permanent drug delivery means or a combination of systemic and site specific means. Examples include, but are not limited to catheter, stent, vascular wrap, pump, shunt or other temporary or permanent drug delivery means.

A. Device

In some embodiments, the present invention provides a device for intracorporeal use, the device comprising a vascular prosthesis; and at least one source of a compound of the present invention.

In other embodiments, the present invention provides a device configured to release the compound to a body lumen or organ within an intracorporeal body to inhibit cell proliferation or cell migration. In a further embodiment, the device is configured to release the compound to a body lumen or organ within an intracorporeal body to inhibit smooth muscle cell proliferation.

In another embodiment of the present invention the drug delivery means is a device such as an implant including graft implants, vascular implants, non-vascular implants, implantable luminal prostheses, wound closure implants, drug delivery implants, sutures, biologic delivery implants, urinary tract implants, inter-uterine implants, organ implants, ophthalmic implants, bone implants including bone plates, bone screws, dental implants, spinal disks, or the like.

The implant typically allows for one or more of the following: support, contain, hold together, affix, plug, close, maintain, deliver drug, deliver biologics—to a body lumen, organ, vessel, conduit, muscle, tissue mass or bone for the prevention or treatment of disease conditions, such as for example hyper-proliferative diseases, restenosis, cardiovascular disease, inflammation, wound healing, cancer, aneurysm, diabetic disease, abdominal aortic aneurysm, hyper-calcemia, or others.

The implant of the present invention can be formed of metal, metal alloy, polymer, ceramic, semi-metal, nanocomposites or combination thereof. For example, an implant can be made from metal such as tantalum, iron, magnesium, molybdenum or others; from a degradable or non degradable metal alloy such as 316L stainless steel, carbon steel, magnesium alloy, NI—Ti, Co—Cr such as L605, MP35 or other; from a polymer that is degradable or non-degradable such as poly lactic acid, poly glycolic acid, poly esters, polyamide, copolymers or others or blends of polymers; combination of metals and metals or metal alloys such as implant made from combination of layers of stainless steel and tantalum or others; nanocomposites such as nano carbon fibers or nano carbon tubules or others.

In another embodiment, the present invention provides a device wherein the implant is a vascular prosthesis. In some embodiments, the vascular prosthesis comprises an expandable structure. In other embodiments, the vascular prosthesis comprises a stent, graft, or a scaffold formed at least in part from an open lattice. In still other embodiments, the vascular prosthesis is a stent.

In another embodiment, the compounds of the present invention can be applied adjacent to the surface of the implant. For example the compounds of the present invention can be incorporated within the implant, contained within a coating, or carried on the implant.

In some embodiments, the present invention provides a device comprising a vascular prosthesis wherein the vascular prosthesis has a luminal and a tissue facing surface, and wherein the compound is associated with at least one of the luminal or tissue facing surfaces.

In a further embodiment, the compounds of the present invention are applied on all implant surfaces. In another embodiment, the compounds of the present invention are applied only to the abluminal or luminal surface. In yet another embodiment, the compounds of the present invention are applied only to high stress or low stress areas.

In another embodiment, the compounds of the present invention are contained within an erodible or non-erodible filament or filaments that are adjacent to the implant.

An example of a stent configuration for carrying a compound of the present invention is illustrated in FIG. 3 in a contracted state. The stent body is formed of multiple rings 110. The rings are formed of crowns 120 and struts 130 in a generally expandable undulating configurations such as, zig-zag, sawtooth, sinusoidal wave or other. The body is joined by links or connectors 140. It is understood that the connectors may be of any length or shape, or may not be needed if the crowns are directly attached to each other. The stent has a typical contracted state diameter of between 0.25-4 mm, or more preferably between 0.7 to 1.5 mm, and a length of between 5 and 100 mm. In its expanded state, the stent diameter is typically at least twice and up to 10 times or more than that of the stent in its contracted state. Thus, a stent with a contracted diameter of between 0.7 to 1.5 mm may expand radially to 2 to 10 mm or more.

Drug eluting stents with potent macrocyclic lactone compounds such as rapamycin (Cypher™) have resulted in late lumen loss in the range of approximately 0.01 mm to 0.2 mm at approximately 4 months to 12 months angiographic follow up. The late lumen loss with bare metal stents have ranged from approximately 0.70 mm to 1.2 mm for the same time period. Lower late lumen loss typically decreased the percent stenosis. However, significantly lower late lumen loss with drug eluting stents as compared to bare metal stents in some cases results in inadequate tissue coverage of the stent surface which potentially may increase incidence of late stent thrombosis.

In a preferred embodiment, the late lumen loss for stent carrying compounds of the present invention after approximately 4 to 12 months after implantation is greater than the late lumen loss for stent carrying the corresponding parent macrocyclic lactone by 0.05 mm to 0.6 mm, preferably by 0.1 mm to 0.4 mm, more preferably by 0.15 to 0.3 mm. For example, late lumen loss after implantation ranges from 0.01 mm to 0.6 mm, preferably from 0.1 mm to 0.5 mm and most preferably from 0.2 mm to 0.4 mm. In another embodiment, the present invention provides late lumen loss for stent carrying compounds of the present invention similar to a stent carrying the corresponding parent macrocyclic lactone. In another preferred embodiment, the present invention provides late lumen loss for stent carrying compounds of the present invention being higher than for a stent carrying the corresponding parent macrocyclic lactone. Higher late lumen can provide increased tissue coverage of the stent which can improve safety of the stent.

In another preferred embodiment, the percent stenosis approximately 4 to 12 months after implantation for a stent carrying compounds of the present invention is greater by 1 to 30 percentage than the percent stenosis for a stent carrying the corresponding parent macrocyclic lactone, preferably from 3 to 20 percentage, more preferably from 5 to 15 percentage. In yet another preferred embodiment, the present invention provides percent stenosis for a stent carrying compounds of the present invention similar to a stent carrying the corresponding parent macrocyclic lactone. In another preferred embodiment, the present invention provides percent stenosis for a stent carrying compounds of the present invention higher than a stent carrying the corresponding parent macrocyclic lactone. In another preferred embodiment, the percent stenosis for a stent carrying compounds of the present invention is higher than a stent carrying the corresponding parent macrocyclic lactone but lower than the bare metal stent. Higher stenosis can provide increased tissue coverage of the stent which can improve safety of the stent.

In some embodiments, the present invention provides a device wherein the amount of compounds of the present invention on the implant is less than about 1 g/cm². In other embodiments, the amount of compounds on the implant can range from about 1 nanogram/cm² to about 1000 microgram/cm², preferably from about 1 microgram/cm² to about 500 microgram/cm², more preferably from about 10 microgram/cm² to about 400 microgram/cm².

In a further embodiment, the present invention provides a device wherein the concentration of the compound of the present invention in the tissue adjacent to the implant is from about 0.001 ng/gm tissue to about 1000 μg/gm tissue, preferably from about 1 ng/gm tissue to about 500 μg/gm tissue, more preferably from about 100 ng/gm tissue to about 100 μg/gm tissue.

In another embodiment, the compounds of the present invention can be released from the implant over a period ranging from 1 day to 2 years, preferably from 3 days to 6 months, more preferably from 1 week to 3 months. In other embodiments, the compounds of the present invention can be released from the implant over a period greater than 1 day, preferably greater than 2 weeks, more preferably greater than 1 month. In another embodiment, the compounds of the present invention can require greater than 2 years to be fully released from the stent. In some embodiments, the amount of compound released over the given time period is at least 25%. In other embodiments, the amount of compound released is at least 50%. In still other embodiments, the amount of compound released is at least 75%. In yet other embodiments, the amount of compound released can be at least 80, 85, 90, 91, 92, 93, 94, 95, 96, 97, 98 or 99%.

In a further embodiment, the present invention provides a device wherein at least 75% of the compound is released from the device in a period from about 1 day to about 2 years. In another embodiment, at least 90% of the compound is released from the device in a period from about 3 day to about 6 months. In still another embodiment, at least 90% of the compound is released from the device in a period from about 1 week to about 3 months.

In some embodiments, the present invention provides a device that further includes a therapeutic agent, such as those described below. In some other embodiments, the therapeutic agent is released prior to, concurrent with, or subsequent to the release of the compound. In other embodiments, the compound is released from a first source and the therapeutic agent is released from a second source. In still other embodiments, the compound and the therapeutic agent are released from a single source.

B. Administration

The compounds of the present invention can be administered systemically on a daily, intermittent or one-time dose basis. The daily systemic dose can range from 0.1 mg to 20 mg preferably 0.5 mg to 10 mg, most preferably from 1 mg to 5 mg per day. One of skill in the art will appreciate that other doses are also useful in the present invention.

The compounds of the present invention can be released from the implant at rates ranging from about 1 nanogram/cm²/day to about 1000 microgram/cm²/day, preferably from about 1 microgram/cm²/day to about 200 microgram/cm²/day, more preferably from about 5 microgram/cm²/day to about 100 microgram/cm²/day.

C. Pharmaceutical Formulations

In some embodiments, the present invention provides a pharmaceutical composition comprising a pharmaceutically acceptable excipient and a compound of the formula:

wherein R¹, R², R³, R⁵, R⁶ and R⁸ are each independently a member selected from the group consisting of H, C₁₋₆ alkyl and OH; R⁴, R⁷ and R⁹ are each independently selected from the group consisting of C₁₋₆ alkoxy and OH; R¹⁰ is a member selected from the group consisting of H, —OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃, wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; each of L¹ and L⁴ are independently selected from the group consisting of:

each of L² and L³ are independently selected from the group consisting of:

and salts, hydrates, isomers, metabolites and prodrugs thereof.

In some embodiments, the present invention provides a pharmaceutical composition wherein the pharmaceutically acceptable excipient is a member selected from the group consisting of a polymer, a solvent, an antioxidant, a binder, a filler, a disintegrant, a lubricant, a coating, a sweetener, a flavor, a stabilizer, a colorant, a metal, a ceramic and a semi-metal. In other embodiments, the pharmaceutically acceptable excipient is a polymer.

The active ingredients of the present invention may be mixed with pharmaceutically acceptable carriers, diluents, adjuvants, excipients, or vehicles, such as preserving agents, fillers, polymers, disintegrating agents, glidants, wetting agents, emulsifying agents, suspending agents, sweetening agents, flavoring agents, perfuming agents, lubricating agents, acidifying agents, and dispensing agents, depending on the nature of the mode of administration and dosage forms. Such ingredients, including pharmaceutically acceptable carriers and excipients that may be used to formulate oral dosage forms, are described in the Handbook of Pharmaceutical Excipients, American Pharmaceutical Association (1986), incorporated herein by reference in its entirety. Examples of pharmaceutically acceptable carriers include water, ethanol, polyols, vegetable oils, fats, waxes polymers, including gel forming and non-gel forming polymers, and suitable mixtures thereof. Examples of excipients include starch, pregelatinized starch, Avicel, lactose, milk sugar, sodium citrate, calcium carbonate, dicalcium phosphate, and lake blend. Examples of disintegrating agents include starch, alginic acids, and certain complex silicates. Examples of lubricants include magnesium stearate, sodium lauryl sulphate, talc, as well as high molecular weight polyethylene glycols. One of skill in the art will appreciate that other different excipients can be used in formulations according to the present invention and the list provided herein is not exhaustive.

Suitable nondegradable or slow degrading polymer coatings include, but are not limited to, polyurethane, polyethylenes imine, ethylene vinyl alcohol copolymer, silicone, C-flex, nylons, polyamide, polyimide, polytetrafluoroethylene (PTFE), parylene, parylast, poly(methyl methacrylate), poly(n-butyl methacrylate), poly(butyl methacrylate) copolymer or blended with poly(ethylene vinyl acetate), poly(methyl methacrylate), poly(2-hydroxy ethyl methacrylate), poly(ethylene glycol methacrylates), poly(vinyl chloride), poly(dimethyl siloxane), poly(ethylene vinyl acetate), polycarbonate, polyacrylamide gels, and the like, including other synthetic or natural polymeric substances; mixtures, copolymers, or combinations thereof.

Suitable biodegradable polymer coatings include, but are not limited to, poly(lactic acid), polylactates, poly(glycolic acid), polyglycolates and copolymers and isomers, poly dioxanone, poly(ethyl glutamate), poly(hydroxybutyrate), polyhydroxyvalerate and copolymers, polycaprolactone, polyanhydride, poly(ortho esters); poly(ether esters), poly ethylene glycols, poly(ethylene oxide), poly(trimethyl carbonate), polyethylenecarbonate, copolymers of poly(ethylenecarbonate) and poly(trimethyl carbonate), poly(propylene carbonate), poly(iminocarbonates), starch based polymers, cellulose acetate butyrate, polyester amides, polyester amines, polycyanoacrylates, polyphosphazenes, N-vinyl-2-pyrrolidone, poly maleic anhydride, quaternary ammonium compounds including stearyl ammonium chloride and benzyl ammonium chloride, copolymers and other aliphatic polyesters, or suitable copolymers thereof including copolymers of poly(L-lactic acid) and poly(e-caprolactone); mixtures, copolymers, or combinations thereof.

Suitable natural coatings include: fibrin, albumin, collagen, gelatin, glycosoaminoglycans, oligosaccharides and poly saccharides, chondroitin, chondroitin sulphates, hypoxyapatite, phospholipids, phosphorylcholine, glycolipids, fatty acids, proteins, cellulose, and mixtures, copolymers, or combinations thereof.

Suitable non polymeric coatings include metallic coatings such as tungsten, magnesium, cobalt, zinc, iron, bismuth, tantalum, gold, platinum, stainless steel such as 316L, 304, titanium alloys; ceramics coatings such as silicon oxide; semi-metals such as carbon, nanoporous coatings; or combination thereof.

In some embodiments, the pharmaceutically acceptable excipient is a polymer is selected from the group consisting of polyurethane, polyethylene imine, ethylene vinyl alcohol copolymer, silicone, C-flex, nylons, polyamide, polyimide, polytetrafluoroethylene (PTFE), parylene, parylast, poly(methacrylate), poly(vinyl chloride), poly(dimethyl siloxane), poly(ethylene vinyl acetate), polycarbonate, polyacrylamide gels, poly(methyl methacrylate), poly(n-butyl methacrylate), poly(butyl methacrylate) copolymer or blended with poly(ethylene vinyl acetate), poly(methyl methacrylate), poly(2-hydroxy ethyl methacrylate), poly(ethylene glycol methacrylates), poly(ethylene carbonate), Poly L lactide-glycolide copolymer, poly L lactide-trimethylene carbonate copolymer and Poly L-lactide. In a further embodiment, the polymer is poly(n-butylmethacrylate).

In a further embodiment, the present invention provides a composition wherein the compound is present in an amount of at least 25% (w/w) in a mixture of the compound and the polymer. In another embodiment, the compound is present in an amount of at least 50% (w/w). In a further embodiment, the compound is present in an amount of at least 75% (w/w). One of skill in the art will appreciate that other compositions are useful in the present invention.

In another embodiment, the compounds of the present invention can be applied onto a stent without a coating. In another embodiment, compounds of the present invention can be applied onto a stent in combination with a polymer coating such as a compounds of the present invention-polymer matrix. The compounds of the present invention can be fully or partially crystallized or in an amorphous form. The polymer can be non degradable, partially degradable or fully degradable. The coating can also be a non-polymeric such as metallic coating. In another embodiment, the compounds of the present invention can be applied on a stent alone or contained in a coating with a polymer or non polymer topcoat. In another embodiment, the stent includes an underlayer coating disposed between the stent surface and the compounds of the present invention or compounds of the present invention-polymer matrix. Suitable underlayer coatings can be polymeric such as paralyne C, parylene N, ethylene vinyl alcohol (EVOH), polycaprolactone, ethylvinyl hydroxylated acetate (EVA), or others or combination thereof or non polymeric such as metallic or ceramic or others.

The coatings can be applied by any of the different methods which include but are not limited to spraying, ultrasonic deposition, dipping, inkjet dispension, plasma deposition, ion implantation, sputtering, evaporation, vapor deposition, pyrolysis, electroplating, glow discharge coating, or others or combination thereof.

The coating thickness can range from 1 nanometer to 100 micrometers, preferably from 100 nanometers to 50 micrometers, more preferably from 1 micrometer to 20 micrometers.

The compounds of the present invention can be combined with antioxidants or stabilizers to prevent degradation due to oxidation or other means. Antioxidants include but are not limited to butylated hydroxytoluene (BHT), ferrous sulfate, ethylenediamine-tetra-acetic acid (EDTA), or others. Stabilizers include, but are not limited to, amglene, hydroquinone, quinine, sodium metabisulfite or others. Antioxidants and stabilizers can be combined with the compounds directly or blended with the compound formulation such as compound-polymer matrix to reduce conformation change or degradation during manufacturing processes and increase shelf life or storage life of the compounds or compound containing implant. The amount of antioxidants such as BHT in the compounds can range from 0.01% to 10%, preferable from 0.05% to 5% and most preferable from 0.1% to 1%. The amount of stabilizers such as amylene in the compounds can range from 0.001% to 0.1%, preferably from 0.005% to 0.05%, most preferably from 0.01% to 0.02%. One of skill in the art will appreciate that other antioxidants and stabilizers are useful in the present invention.

The compounds of the present invention can be administered in combination with a therapeutic agent such as anti platelets, anti-thrombotics, anti-inflammatory, anti-proliferatives, immunosuppressants, anti-cancer or other agents or combinations thereof. One of skill in the art will appreciate that other therapeutic agents are useful in the present invention.

The therapeutic agents can be incorporated on the stent together with the compounds of the present invention and/or separately from compounds of the present invention. At least a portion of the therapeutic agent can be released from the stent prior to, concurrently or post release of the compounds of the present invention from the stent. The therapeutic agent can also be given separately through systemically or site specific administration prior to, during or post delivery of compounds of the present invention.

For example, compounds of the present invention are given with anti platelets or anti-thrombotics such as heparin, clopidogrel, coumadin, aspirin, ticlid or others. In another example, compounds of the present invention are given with anti-inflammatory agents such as aspirin, diclofenac, indomethacin, sulindac, ketoprofen, flurbiprofen, ibuprofen, naproxen, piroxicam, tenoxicam, tolmetin, ketorolac, oxaprosin, mefenamic acid, fenoprofen, nambumetone (relafen), acetaminophen, and mixtures thereof COX-2 inhibitors, such as nimesulide, NS-398, flosulid, L-745337, celecoxib, rofecoxib, SC-57666, DuP-697, parecoxib sodium, JTE-522, valdecoxib, SC-58125, etoricoxib, RS-57067, L-748780, L-761066, APHS, etodolac, meloxicam, 5-2474, tacrolimus, and mixtures thereof glucocorticoids, such as hydrocortisone, cortisone, prednisone, prednisolone, methylprednisolone, meprednisone, triamcinolone, paramethasone, fluprednisolone, betamethasone, dexamethasone, fludrocortisone, desoxycorticosterone, or others or analogues of the above or combinations thereof.

In some embodiments, the present invention provides a composition where less than about 5% of the compound is metabolized to rapamycin. In some other embodiments, less than about 1% of the compound is metabolized to rapamycin. In still other embodiments, less than about 0.1% of the compound is metabolized to rapamycin.

In other embodiments, the present invention provides a composition in a dosage form, having a daily systemic dose of the compound of from about 0.1 mg to about 20 mg. In some other embodiments, the daily systemic dose of the compound is from about 0.5 mg to about 10 mg. In another embodiment, the daily systemic dose of the compound is from about 1 mg to about 5 mg.

IV. Treatment

The compounds of the present invention can be used to treat conditions responsive to the class of compounds commonly known as macrocyclic trienes or macrocyclic lactones.

The compounds of the present invention can be used to treat diseases in mammals alone or in combination with other agents, including conditions such as:

-   -   a) Treatment and prevention of acute or chronic organ or tissue         transplant rejection, e.g. for the treatment of recipients of         heart, lung, combined heart-lung, liver, kidney, pancreatic,         skin or corneal transplants. They can also be used for the         prevention of graft-versus-host disease, such as following bone         marrow transplantation.     -   b) Treatment and prevention of transplant vasculopathies, e.g.         atherosclerosis.     -   c) Treatment and prevention of cell proliferation and migration         leading to vessel intimal thickening, blood vessel obstruction,         obstructive vascular atherosclerosis, restenosis.     -   d) Treatment and prevention of autoimmune disease and of         inflammatory conditions, such as inflammatory conditions with an         etiology including an autoimmune component such as arthritis         (for example rheumatoid arthritis, arthritis chronica         progrediente and arthritis deformans) and rheumatic diseases.     -   e) Treatment and prevention of asthma.     -   f) Treatment of multi-drug resistance conditions such as         multidrug resistant cancer or multidrug resistant AIDS.     -   g) Treatment of proliferative disorders, e.g. tumors, cancer,         hyperproliferative skin disorder and the like.     -   h) Treatment of infections such as fungal, bacterial and viral.     -   i) Treatment or prevention of cellular proliferation in vascular         shunts.     -   j) Treatment or prevention of ophthalmic conditions and         diseases.

The potency of Compound AR and rapamycin (Sirolimus) for inhibiting human cell proliferation is demonstrated in an in vitro model. The test is described in Example 2 and the results are shown in FIG. 8. Compound AR inhibited growth of smooth muscle cells over a range of concentrations as demonstrated in FIG. 8.

In some embodiments, the present invention provides a method of inhibiting cell proliferation or migration by administering to a subject in need thereof, a therapeutically effective amount of a compound of the present invention.

In other embodiments, the present invention provides a method wherein the compound of the present invention is administered systemically, locally or via a combination thereof.

In some other embodiments, the administration of the compound of the present invention is via oral administration, administration as a suppository, topical contact, parenteral, intravascular, intravenous, intraperitoneal, intramuscular, intralesional, intranasal, pulmonary, mucosal, transdermal, ophthalmic, subcutaneous administration or intrathecal administration.

In still other embodiments, the administration of the compound of the present invention is via delivery through a temporary device or an implant. In another embodiment, the temporary device is selected from the group consisting of a catheter and a porous balloon. In still another embodiment, the implant is a vascular prosthesis. In yet other embodiments, the vascular prosthesis comprises an expandable structure. In another embodiment, the vascular prosthesis comprises a stent, graft, or a scaffold formed at least in part from an open lattice.

In one embodiment, the inhibition concentration (IC₅₀) of compounds of the present invention is approximately equal to the IC₅₀ of its corresponding parent macrocyclic lactone (prior to the modifications in FIG. 1). In another embodiment, the IC₅₀ is higher than the IC₅₀ of its corresponding parent macrocyclic lactone. In yet another embodiment, the IC₅₀ is lower than the IC₅₀ of its corresponding parent macrocyclic lactone. For example, the IC₅₀ is two to thousand times lower than the IC₅₀ of its corresponding parent macrocyclic lactone.

In a preferred embodiment, the IC₅₀ of a compound of the present invention is 1.5 to 1,000 times higher than its corresponding parent macrocyclic lactone, preferably 2 to 100 times higher than the corresponding parent macrocyclic lactone and more preferably 5 to 50 times higher than the corresponding parent macrocyclic lactone. In another embodiment the IC₅₀ of a compound of the present invention is from about 0.1 nM to about 1 μM, preferably from about 1 nM to about 0.5 μM, more preferably from about 5 nM to about 100 nM.

Other means of measuring the effectiveness of the compounds of the present invention include measuring effective concentration (EC₅₀). In one embodiment, the EC₅₀ is approximately equal to the EC₅₀ of the corresponding parent macrocyclic lactone. In another embodiment, the EC₅₀ is higher than the EC₅₀ of the corresponding parent macrocyclic lactone. In yet another embodiment, the EC₅₀ is lower than the EC₅₀ of the corresponding parent macrocyclic lactone.

In some embodiments, the present invention provides a method wherein the effective dose of the compound is from about 0.1 mg to about 20 mg. In some other embodiments, the effective dose of the compound is from about 0.5 mg to about 10 mg. In still other embodiments, the effective dose of the compound is from about 1 mg to about 5 mg.

The compounds, compositions and devices of the present invention are useful for cytokine inhibition. Pro-inflammatory cytokine IL-6 is synthesized in response to diverse inflammatory stimuli and acts as a key regulatory protein in the inflammatory cascade. IL-6 plays a pivotal role in stimulating the acute-phase response after injury, including the release of fibrinogen and C-reactive protein.

IL-6 may also be directly involved in restenosis, as it has been shown to stimulate leukocyte recruitment into the vessel wall, and vascular smooth muscle cell proliferation, factors that are essential to the pathogenesis of hyperproliferative diseases such as restenosis.

Matrix metalloproteinases (MMP-9) play a key role in cellular migration and proliferation including conditions such as neointimal growth and vascular remodeling after stent implantation. Release of MMPs cause increases in proteoglycan rich, extracellular matrix which increases smooth muscle cell migration after vascular injury.

Plasma active MMP-9 levels may be a useful independent predictor of bare metal stent ISR. (Elevated Plasma Active Matrix Metalloproteinase-9 Level Is Associated With Coronary Artery In-Stent Restenosis, Arterioscler Thromb Vasc Biol. 2006; 26:e121-e125.)

Monocyte chemoattractant protein 1 (MCP-1) is a potent monocyte chemoattractant secreted by many cells in vitro, including vascular smooth muscle and endothelial cells. Eliminating MCP-1 gene or blockade of MCP-1 signals has been shown to decrease atherogenesis in hypercholesterolemic mice. MCP-1 has been shown to play a role in pathogenesis of neointimal hyperplasia in monkeys. (Importance of Monocyte Chemoattractant Protein-1 Pathway in Neointimal Hyperplasia After Periarterial Injury in Mice and Monkeys, Circ Res. 2002; 90:1167-1172.) MCP-1 is also strongly expressed in a small subset of cells in macrophage-rich regions of human and rabbit atherosclerotic lesions (Expression of Monocyte Chemoattractant Protein 1 in Macrophage-Rich Areas of Human and Rabbit Atherosclerotic Lesions, PNAS, Vol 88, 5252-5256) Inhibition of MCP-1 can have therapeutic impact on treatment and prevention of inflammatory, proliferative and other disease conditions discussed above.

Interleukin-10 (IL-10) is an anti-inflammatory cytokine with a powerful inhibitory effect on monocytes. IL-10 has been shown to reduce postinjury intimal hyperplasia (Interleukin-10 Inhibits Intimal Hyperplasia After Angioplasty or Stent Implantation in Hypercholesterolemic RabbitsCirculation. 2000; 101:908-916). Endogenous production of IL-10 by human monocytes in response to LDL stimulation inhibits IL-12 production, indicating a cross-regulatory action of IL-10 that may counterbalance the proinflammatory response

It can be appreciated that all embodiments disclosed in the present invention can be utilized alone or in combination with other embodiments or examples in this invention.

V. Examples Example 1 Preparation of 16-O-Demethyl Macrocyclic Lactone (Compound AR)

Macrocyclic lactone rapamycin (1000 mg, 10.75 mmol) in 500 ml acetonitrile was treated with 500 ml 0.1N hydrochloric acid. The resulting solution was stirred at room temperature for about 28 hours. Then the reaction mixture was extracted with dichloromethane in a separatory funnel. The organic layers were washed with water and brine, then washed with 0.1M sodium phosphate buffer (pH=7.4) twice or until pH=7, then washed three times with distilled (DI) water. Finally the organic layer was dried over Na₂SO₄ and placed in a refrigerator overnight. Concentration in vacuum provided an off-white powder of Compound AR (approx. 820 mg).

Compound AR was purified by preparative HPLC on an Ascentis C18 (21.2×250 mm, 10 μm) column from SUPECO using Methanol:water (80:20) as mobile phase from 0-12 min then changed to 100% Methanol from 12.01-20 min at a flow rate of 15 ml/min. The loading concentration was 350 mg/ml and the injection volume was 100 ul. The compound was monitored by UV absorbance at 254 nm. Under these conditions, Compound AR eluted between 9.0-11.5 min whereas the starting materials and by products eluted between 17.0-20.0 min.

The preparative HPLC can also be conducted using a gradient of acetonitrile:water (starting from 70:30) as mobile phase and monitored by UV absorbance at 278 nm. The preparative HPLC chromatogram using this method of separation is shown in FIG. 4.

The fractions containing Compound AR were collected and pooled together, then solvent was evaporated by using a rotovac and freeze drier to give an off-white powder of Compound AR.

¹H NMR (CDCl₃, 400 MHz, mixture of trans:cis amide rotamers, chemical shifts in parentheses refer to the major rotamer) is presented in FIG. 5. δ, ppm 0.532 (q, J=12 Hz, 1H), 0.890 (d, J=6.8 Hz, 3H), 0.921 (d, J=6.8 Hz, 3H), 0.931 (d, J=6.4 Hz, 3H), 0.971 (d, J=6.8 Hz, 3H), 0.991 (d, J=6.6 Hz, 3H), 1.005 (d, J=6.4 Hz, 3H), 1.686 (s, 3H), 1.772 (s, 3H), 1.773 (s, 3H), 1.823 (s, 3H), 3.330 (s, 3H), 3.380 (s, 3H), 3.859 (d, J=5.2 Hz, 1H), 4.001 (d, J=3.6 Hz, 1H), 4.03-4.07 (m, 1H), 4.22 (br, 1H), 5.21-5.28 (m, 3H), 5.336 (d, J=11.6 Hz, 1H), 5.384 (dd, J=14.8, 9.6 Hz, 1H), 6.117 (dd, J=14.4, 10.8 Hz, 1H), 6.243 (dd, J=14.4, 10.4 Hz, 1H), 6.376 (dd, J=14.8, 11.2 Hz, 1H).

Compared with the proton NMR of the parent compound, the disappearance of the peak at 3.14 ppm demonstrates the demethylation at the C 16 position only and completion of reaction. (See Journal of Antibiotics 1991, 44(6), 688 for assignment of the NMR spectra for rapamycin.)

The chemical structure of Compound AR was further verified by mass spectrometric experiments. The fragmentation patterns indicated the presence of the m/z 900 whereas Rapamycin provides m/z 914 under the same conditions. The results of liquid chromatography and mass spectroscopy experiments are provided in FIG. 6 which shows the identification of Compound AR with m/z 900.

The total content of Compound AR was determined by a reverse phase HPLC using a Supelco C18 (4.6×150 mm, 5 μm) column from Sigma Aldrich using methanol:water (90:10) as mobile phase and a flow rate of 1 ml/min. Compound AR was monitored by UV absorbance at 254 nm. Compound AR had a retention time of 7.97 min. FIG. 7 shows the analytical HPLC chromatogram of Compound AR with total content of >98%. The purity of Compound AR was determined by a reverse phase HPLC using a YMC ODS-AL C18 (4.6×250 mm, 5 μm) column from Waters Corporation using an acetonitrile:water gradient mobile phase and a flow rate of 1.0 ml/min. FIG. 7 b shows major isomers of Compound AR with a purity>98% as monitored by UV absorbance at 278 nm.

As a means to minimize oxidation of the Compound AR, 0.1% w/w of Butylated Hydroxytoluene (BHT) was added after preparative HPLC.

Example 2 Biological Activity of Compound AR

Potency of the Compound AR was demonstrated by in vitro human smooth muscle cell culture testing. The amounts of incorporated thymidine for samples of Compound AR of varying concentrations (0.005, 0.01, 0.05, 0.1, 0.5, and 1 μM) and of rapamycin of varying concentrations (0.0005, 0.001, 0.01, and 0.1 μM) were measured after exposure for different times of 1, 3 and 8 hours. The IC₅₀ for Compound AR and rapamycin were approximately 0.05 and 0.01 μM, respectively, after smooth muscle cells were exposed to Compound AR and rapamycin for the shorter periods of 1 and 3 hours (as shown in Table 1 and FIG. 8). The IC_(so) of Compound AR and rapamycin was approximately 0.005 and 0.001 μM, respectively, after smooth muscle cells were exposure to Compound AR and rapamycin for 8 hours. The IC₅₀ of Compound AR was approximately five times higher than that of rapamycin.

TABLE I Data of percentage proliferation of human smooth muscle cells after exposure to varying concentrations of rapamycin and Compound AR Compound AR Concentration (micromolar) 0.005 0.01 0.05 0.1 0.5 % Proliferation After One Hr Exposure to 84 66 54 55 57 Compound AR % Proliferation After Three Hr Exposure 69 56 50 52 48 to Compound AR % Proliferation After Eight Hr Exposure 52 38 40 36 35 to Compound AR Rapamycin Concentration (micromolar) 0.0005 0.001 0.01 0.1 % Proliferation After One Hr Exposure to 105 75 54 50 Rapamycin % Proliferation After Three Hr Exposure to 79 63 48 39 Rapamycin % Proliferation After Eight Hr Exposure to 57 51 40 38 Rapamycin

Example 3 Preparation of Stents Containing Compound AR

15 mg poly(n-butyl methacrylate) (PBMA) was dissolved into 3 mL dichloromethane at room temperature. 10 mg of Compound AR was placed in a vial and dissolved in 2 mL dichloromethane with or without 0.1% (w/w) BHT. The solutions were combined and further diluted with 10 mL dichloromethane.

A microprocessor-controlled ultrasonic sprayer was used to apply 450 ug of the drug containing PBMA solution to the entire surface of 18 mm metal stent (available from Elixir Medical Corp, Sunnyvale, Calif.). After coating, the stent was placed in a vacuum chamber. The stent was then mounted on the balloon of a 3.0×20 mm PTCA delivery catheter. The catheter was then inserted in a coil and packaged in a Tyvek® pouch. The pouch was sterilized by ethylene oxide. The Tyvek® pouch was further packaged in a foil pouch with oxygen scavengers and nitrogen purge and vacuum sealed.

Example 4 In Vivo Testing of Stents Eluting Compound AR

The efficacy of a Compound AR eluting stent system (as prepared above) from Example 3 was evaluated by comparing 28±2 day angiographic outcomes in porcine coronary arteries to the rapamycin eluting stent system, Cypher™ Coronary Stent (Cordis Corporation) in the non-diseased porcine coronary artery model.

The nonatherosclerotic swine model was chosen as this model has been used extensively for stent and angioplasty studies resulting in a large volume of data on the vascular response properties and its correlation to human vascular response (Schwartz et al, Circulation. 2002; 106:1867-1873). The animals were housed and cared for in accordance the Guide for the Care and Use of Laboratory Animals as established by the National Research Council.

All animals were pretreated with aspirin (325 mg) and clopidogel (75 mg) per oral dose beginning at least 3 days prior to the intervention and continuing for the duration of the study. After induction of anesthesia, the left or right femoral artery was accessed using standard techniques and an arterial sheath was introduced and advanced into the artery.

Vessel angiography was performed under fluoroscopic guidance, a 7 Fr. guide catheter was inserted through the sheath and advanced to the appropriate location where intracoronary nitroglycerin was administered. A segment of coronary artery ranging from 2.25 to 4.0 mm mean lumen diameter was chosen and a 0.014″ guidewire inserted. Quantitative Coronary Angiography (QCA) was performed to document the reference vessel diameter.

The appropriately sized stent was advanced to the deployment site. The balloon was inflated at a steady rate to a pressure sufficient to achieve a balloon to artery ratio of 1.30:1.0. Pressure was maintained for approximately 10 seconds. Angiography was performed to document post-procedural vessel patency and diameter.

Follow-up angiography was performed at the designated endpoint for each of the animals. Each angiogram was qualitatively evaluated for evidence of stent migration, lumen narrowing, stent apposition, presence of dissection or aneurysms, and flow characteristics. Upon completion of follow-up angiography, the animals were euthanized.

The hearts were harvested from each animal and the coronary arteries were perfused with 10% buffered formalin at 100 to 120 mm Hg. The hearts were immersed in 10% buffered formalin. Any myocardial lesions or unusual observations were reported.

Angiographic parameters measured or calculated included:

-   -   Marginal vessel (proximal and distal) mean lumen diameter         (post-stent and final only)     -   Mean lumen diameter of the target region (all angiograms)     -   Minimal lumen diameter (MLD) of the target region (post-stent         and final only)     -   Diameter stenosis [1−(MLD/RVD)]×100% where RVD is a calculation         of the reference diameter at the position of the obstruction         (measure obtained by a software-based iterative linear         regression technique to generate an intrapolation of a projected         vessel without the lesion) (final angiogram only)     -   Balloon to artery ratio [balloon/pre-stent mean luminal         diameter]     -   Stent to artery ratio [post-stent/pre-stent mean luminal         diameter]     -   Late loss ratio [MLD final-MLD post-stent]

All animal survived to the designated end point. There were no documented incidents of stent migration, stent malapposition, persistent dissection or evidence of aneurysm. Three outlying data points (total occlusion or near total occlusion) for the Cypher Stent were excluded. The average percent stenosis for the Compound AR stent (approx. 10 microgram/mm length drug dose) was 25.7±17.8 (n=15) as compared to Cypher Stent pooled data from this and previous studies with similar protocols which provided an average percent stenosis of 20.21±11.45 (n=22) for Cypher stents. (FIG. 9).

The Compound AR eluting stents in this example when implanted in the porcine model for 28 days resulted in higher percentage stenosis as compared to the Cypher Stent.

Example 5 In Vivo Pharmacokinetics of Stents Eluting Compound AR

Pharmacokinetic evaluation of the Compound AR stent system from Example 3 was performed at 6 hours, 3 days, 7 days, and 28 days in the porcine coronary artery model. The interventional procedures used were similar to the in vivo angiographic study described in Example 4 up to stent implantation.

The appropriately sized stent was advanced to the deployment site. The balloon was inflated at a steady rate to a pressure sufficient to achieve a balloon to artery ratio of 1:1. Pressure was maintained for approximately 10 seconds. Angiography was performed to document post-procedural vessel patency and diameter. A total of 9 stents (3 per time point) were implanted.

At the appropriate time point the animals were euthanized and the hearts excised. The stented segment including approximately 10 mm of vessel proximal and 10 mm distal to the stented section was excised. The proximal and distal sections were separated and stored in separate vials. The tissue surrounding the stent was carefully removed from stent and each place in separate vials. All were then frozen to −70° C. prior to being analyzed using liquid chromatography mass spectroscopy (LCMS).

All animal survived to the designated end point. The average tissue concentrations for the Compound AR and stent release rates are presented in FIGS. 10 and 11. The Compound AR eluting stent, in this example demonstrates release of Compound AR from the stent with greater than 40% of the drug released at 7 days.

Example 6 Preparation of 17, 18-29, 30-Bis-Epoxide Macrocyclic Lactone (AS)

Add 0.8 mL 5% NaOH-MeOH and 2 ml 30% H₂O₂ to a solution of 1 gram Rapamycin in 40 ml methanol. The reaction mixture was stirred at room temperature for 24 hours. If TLC indicated some rapamycin was still unreacted, additional mixture of 0.8 mL 5% NaOH-MeOH and 2 ml 30% H₂O₂ was added to the reaction solution. Stirring continued at room temperature until TLC indicated the reaction has completed. The solution was extracted with dichloromethane and brine 3 times. The organic layers were combined and washed with brine and water, dried over anhydrous MgSO4, filtered MgSO4 and the solution was evaporated to leave a raw product. This raw product was further purified using TLC plate and giving 0.40 g (40% yields) light yellow powder. ¹H NMR (CDCl₃) (˜4:1 mixture of conformers, only signals of major conformer listed) Major changes compared with rapamycin δ (ppm) 1.75 (s, 1H), 1.98 (s, 1H), 6.71 (ddd, 5H, J1=16 Hz, J2=8 Hz, J3=2.8 Hz). ¹³C DEPT 135 NMR (CDCl₃) (˜4:1 mixture of conformers, only signals of major conformer listed) δ (ppm) 152, 140, 133, 128, 127, 126, 84, 83, 76, 74, 67, 59, 56, 44, 43, 41, 40, 36, 35, 34, 33, 31, 29, 28, 22, 21, 20, 17, 16, 15, 13. Mass Spectra m/z=962 with Rapamycin m/z=930.

Example 7 Biological Activity of 17, 18-29, 30-Bis-Epoxide Macrocyclic Lactone (AS)

Potency of the 17, 18-29, 30-bis-epoxide macrocyclic lactone was demonstrated by in vitro human smooth muscle cell culture testing. The amounts of incorporated thymidine for samples of 17, 18-29, 30-bis-epoxide macrocyclic lactone of varying concentrations (0.005, 0.01, 0.05, 0.1, 0.5, and 1 μM) and of Compound AR of varying concentrations (0.0005, 0.001, 0.01, and 0.1 μM) were measured after exposure for 8 hours. The IC₅₀ of 17, 18-29, 30-bis-epoxide macrocyclic lactone and Compound AR was approximately 0.1 and 0.005 μM, respectively, after smooth muscle cells were exposed to 17, 18-29, 30-bis-epoxide macrocyclic lactone and Compound AR for 8 hours (FIG. 13). The IC₅₀ of 17, 18-29, 30-bis-epoxide macrocyclic lactone was approximately 20 times higher than that of Compound AR.

Example 8 Preparation of 17, 18-19, 20-21, 22-Tris-Epoxide Macrocyclic Lactone (AY)

m-chloroperoxybenzoic acid 0.93 g (3.22 mmol) was added to a solution of 0.50 g (0.5371 mmol) rapamycin in 10 ml CHCl₃ at room temperature. The mixture was stirred at room temperature for 24 hours. If TLC indicated some rapamycin was still unreacted, additional m-chloroperoxybenzoic acid 0.50 g and 5 mL CHCl₃ was added. Stirring was continued at room temperature until no Rapamycin was indicated by TLC. After completion of the reaction, the solution was diluted with dichloromethane, treated with aqueous sodium sulfite until the washings give a negative test with starch-iodide paper. This ensures all excess peracid has been destroyed and the aqueous layer was extracted with several portions of CH₂Cl₂. Then organic layer was washed with two 20 ml portion of 5% sodium bicarbonate to remove benzoic acid. The combined organic extracts were washed with water, dried with anhydrous MgSO₄, filtered and evaporated to leave a crude white solid 0.46 g. The raw product was further purified using TLC plate. MS m/z 978 with Rapamycin m/z 930.

Example 9 Cytokine Inhibition by Macrocyclic Lactone

In cell culture studies, macrophages were activated to secrete cytokines such as Il-6, MMP-9, MCP-1 and IL-10 by treating the cells to E Coli lippopolysaccharide (LPS) Inhibition of these cytokines upon treatment of the activated macrophages with Compound AR and rapamycin with 10 nM concentration was tested using ELISA assay. The inhibition of pro-inflammatory and cell proliferation and migration inducing cytokines upon exposure to the macrocyclic lactone is presented in FIG. 12( a). The inhibition of anti-inflammatory cytokine IL-10 upon exposure to macrocyclic lactone Compound AR and Sirolimus are presented in FIG. 12( b).

MMP-9 levels in the 1st, 3rd and 7th day after stent implantation were positively correlated to the late loss index 6 months after stent implantation (Elevated matrix metalloproteinase expression after stent implantation is associated with restenosis. Int J. Cardiol. 2006; 112(1):85-90).

Compound AR and Sirolimus did not show and significant inhibition of release of IL-6. Compound AR significantly reduced the production of both the cytokines MMP-9 and MCP-1 as compared to Sirolimus which increased the production of MMP-9 and did not impact the production of MCP-1.

Compound AR and Sirolimus did not show any difference in inhibition of release of IL-6. On the other hand, Compound AR reduced the production of cytokine MMP-9 while Sirolimus increased the production of MMP-9. Compound AR reduced the production of cytokine MCP-1 as compared to Sirolimus which did not impact the production of MCP-1. Compound AR and Sirolimus both inhibit the production of anti-inflammatory cytokine IL-10.

Compounds claimed in the present invention, such as Compound AR can provide better therapeutic response with higher levels of anti-inflammatory effect (such as greater inhibition of pro-inflammatory cytokine MCP-1) and higher levels of anti-cell proliferative and anti-cell migratory effect (such as greater inhibition of pro-proliferative and migration cytokine MMP-9).

Example 10 Testing of Compound AR Eluting Stents in Human Clinical Trial

Clinical testing of the Compound AR coated stent was conducted on 15 human subjects. Safety of the Compound AR coated stent was evaluated clinically through the evaluation of major adverse cardiac events defined as: death, myocardial infarction (both Q-wave and non-Q-wave), and target lesion revascularization. Efficacy was evaluated through angiographic and intravascular ultrasound (IVUS) results at 4 months. The primary endpoint of the study was angiographic in-stent late lumen loss. Secondary endpoints were Major Adverse Cardiac Events (MACE) and additional angiographic and IVUS evaluation. The clinical study was approved by local Ethics Committee and all patients signed an Ethics approved informed consent before entry into the clinical study.

All patients were pretreated with aspirin and ticlopidine (500 mg) per oral beginning at least 1 day prior or on the day of the index procedure. Aspirin (>100 mg/day and Clopidogrel (75 mg/day) were continued through for at least six months. In accordance with hospital standard percutaneous practice, the left or right femoral artery was accessed using standard techniques and an arterial sheath was introduced and advanced into the artery.

Index procedure vessel angiography was performed under fluoroscopic guidance, a 6 or 7 Fr. guide catheter was inserted through the sheath and advanced to the appropriate location; intracoronary nitroglycerin was administered. A segment of coronary artery ranging from 3.0 mm to 3.5 mm mean lumen diameter was chosen and a 0.014″ guidewire inserted. Quantitative Coronary Angiography (QCA) was performed to document the reference vessel diameter. Predilatation of the lesion was performed prior to stent implantation using standard technique.

Following predilatation, the appropriately sized stent (3.0×18 mm or 3.5×18 mm was advanced to the deployment site. The balloon was inflated at a steady rate to a pressure to fully deploy the stent. Pressure was maintained for approximately 30 seconds. Post dilatation of the stent could be performed as needed to assure good stent apposition to the vessel wall. Angiographic and intravascular ultrasound imaging (IVUS) was performed and recorded.

Follow-up angiography and IVUS was performed at the designated endpoint of 4 months for each patient. Each angiogram was qualitatively evaluated for evidence of lumen narrowing, stent apposition, and flow characteristics.

Angiographic and IVUS parameters measured or calculated included:

-   -   Marginal vessel (proximal and distal) mean lumen diameter         (post-stent and final)     -   Mean lumen diameter of the target region (all angiograms)     -   Minimal lumen diameter (MLD) of the target region (post-stent         and final only)     -   Diameter stenosis [1−(MLD/RVD)]×100%] where RVD is a calculation         of the reference diameter at the position of the obstruction         (measure obtained by a software-based iterative linear         regression technique to generate an intrapolation of a projected         vessel without the lesion) (final angiogram only).     -   In-stent Late Lumen Loss [MLD final-MLD post-stent]     -   In-stent percent neointimal volume as assessed by IVUS

All patients underwent 4 month clinical and angiographic follow-up. No patients experience any major adverse cardiac events during the follow-up period. Angiographic results demonstrated that the primary endpoint of angiographic in-stent late lumen loss was 0.16±0.32 mm. IVUS analysis was conducted on 13 of 15 patients and the results demonstrated in-stent percent neointimal volume of 3.7±2.7%.

As a comparison, Cypher stent tested in a pilot study and demonstrated similar clinical safety with no clinical events and angiographic results at 4 months of in-stent late lumen loss for the slow release group (the current commercially available formulation) of 0.09±0.3 mm and instent percent neointimal volume by IVUS to be 0.3±0.6% (Sousa, JE, Circulation 2001; 103; 192-195).

Although the foregoing invention has been described in some detail by way of illustration and example for purposes of clarity of understanding, one of skill in the art will appreciate that certain changes and modifications may be practiced within the scope of the appended claims. In addition, each reference provided herein is incorporated by reference in its entirety to the same extent as if each reference was individually incorporated by reference. 

1.-76. (canceled)
 77. A method of inhibiting cell proliferation or cytokine production, comprising administering to a subject in need thereof a therapeutically effective amount of a compound of the formula

wherein: R⁴ is —OH; R⁷ and R⁹ are each independently —OH or —OCH₃; and R¹⁰ is selected from the group consisting of H, —OH, —OP(O)Me₂,

—O—(CH₂)_(n)—OH and —O—(CH₂)_(m)—O—(CH₂)_(o)—CH₃, wherein subscripts n and m are each independently from 2 to 8 and subscript o is from 1 to 6; or a salt or isomer thereof.
 78. The method of claim 77, wherein the compound is administered systemically or locally, or a combination thereof.
 79. The method of claim 77, wherein the compound is administered orally, topically, parenterally, intravascularly, intravenously, intraperitoneally, intramuscularly, intralesionally, intranasally, pulmonarily, mucosally, transdermally, ophthalmically, subcutaneously, intrathecally, or as a suppository.
 80. The method of claim 77, wherein the compound is administered via delivery from a temporary device or an implant.
 81. The method of claim 80, wherein the temporary device is a catheter or a porous balloon.
 82. The method of claim 80, wherein the implant is a vascular prosthesis.
 83. The method of claim 82, wherein the vascular prosthesis comprises an expandable structure.
 84. The method of claim 82, wherein the vascular prosthesis comprises a scaffold formed at least in part from an open lattice.
 85. The method of claim 82, wherein the vascular prosthesis comprises a stent.
 86. The method of claim 82, wherein the vascular prosthesis comprises a graft.
 87. The method of claim 82, wherein the vascular prosthesis has a luminal surface and a tissue-facing surface, and wherein the compound is associated with at least one of the luminal and tissue-facing surfaces.
 88. The method of claim 80, wherein the amount of the compound associated with the temporary device or implant is from about 1 nanogram/cm² to about 1000 micrograms/cm².
 89. The method of claim 80, wherein the amount of the compound associated with the temporary device or implant is from about 1 microgram/cm² to about 500 micrograms/cm².
 90. The method of claim 80, wherein the amount of the compound associated with the temporary device or implant is from about 10 micrograms/cm² to about 400 micrograms/cm².
 91. The method of claim 80, wherein the temporary device or implant is configured to release the compound to a body lumen or organ in a mammalian body.
 92. The method of claim 80, wherein the concentration of the compound in tissue adjacent to the temporary device or implant is from about 0.001 ng/gm tissue to about 1000 ug/gm tissue.
 93. The method of claim 80, wherein the concentration of the compound in tissue adjacent to the temporary device or implant is from about 1 ng/gm tissue to about 500 ug/gm tissue.
 94. The method of claim 80, wherein the concentration of the compound in tissue adjacent to the temporary device or implant is from about 100 ng/gm tissue to about 100 ug/gm tissue.
 95. The method of claim 80, wherein at least 75% of the compound is released from the temporary device or implant in a period from about 1 day to about 2 years.
 96. The method of claim 80, wherein at least 90% of the compound is released from the temporary device or implant in a period from about 3 days to about 6 months.
 97. The method of claim 80, wherein at least 90% of the compound is released from the temporary device or implant in a period from about 1 week to about 3 months.
 98. The method of claim 77, wherein the compound is administered with a pharmaceutically acceptable excipient.
 99. The method of claim 98, wherein the pharmaceutically acceptable excipient is selected from the group consisting of polymers, solvents, stabilizers, antioxidants, binders, fillers, disintegrants, lubricants, glidants, wetting agents, emulsifying agents, suspending agents, dispensing agents, acidifying agents, preserving agents, sweeteners, flavors, colorants, perfuming agents, coatings, metals, semi-metals, and ceramics.
 100. The method of claim 99, wherein the pharmaceutically acceptable excipient is a polymer.
 101. The method of claim 100, wherein the polymer is selected from the group consisting of polyurethanes, polyethylene imines, ethylene-vinyl alcohol copolymers, poly(ethylene-vinyl acetate), silicone, C-flex, nylons, polyamides, polyimides, polytetrafluoroethylene (PTFE), parylene, parylast, polymethacrylates, poly(methyl methacrylate), poly(n-butyl methacrylate), poly(2-hydroxyethyl methacrylate), poly(ethylene glycol-methacrylate), blends or copolymers of poly(butyl methacrylate) and poly(ethylene-vinyl acetate), poly(vinyl chloride), poly(dimethyl siloxane), polycarbonates, poly(ethylene carbonate), polyacrylamide gels, poly(L-lactide-glycolide) copolymers, poly(L-lactide-trimethylene carbonate) copolymers, and poly(L-lactide).
 102. The method of claim 100, wherein the polymer is selected from the group consisting of poly(ethylene carbonate), poly(L-lactide-glycolide) copolymers, and poly(n-butyl methacrylate).
 103. The method of claim 100, wherein the compound is present in an amount of at least 25% (w/w) in a mixture of the compound and the polymer.
 104. The method of claim 100, wherein the compound is present in an amount of at least 50% (w/w) in a mixture of the compound and the polymer.
 105. The method of claim 100, wherein the compound is present in an amount of at least 75% (w/w) in a mixture of the compound and the polymer.
 106. The method of claim 77, wherein the compound is administered with a pharmaceutically acceptable excipient via a vascular prosthesis, and wherein the pharmaceutically acceptable excipient comprises a polymer selected from the group consisting of poly(ethylene carbonate), poly(L-lactide-glycolide) copolymers, and poly(n-butyl methacrylate).
 107. The method of claim 77, further comprising administering an additional therapeutic agent.
 108. The method of claim 107, wherein the additional therapeutic agent is selected from the group consisting of anti-platelet agents, anti-thrombotic agents, anti-inflammatory agents, anti-proliferative agents, immunosuppressant agents, and anti-cancer agents.
 109. The method of claim 77, wherein the compound is racemic at the C-16 position.
 110. The method of claim 77, wherein the compound has an (R)-stereochemistry at the C-16 position.
 111. The method of claim 77, wherein the compound has an (S)-stereochemistry at the C-16 position.
 112. The method of claim 77, wherein the effective dose of the compound is from about 0.1 mg to about 20 mg.
 113. The method of claim 77, wherein the effective dose of the compound is from about 0.5 mg to about 10 mg.
 114. The method of claim 77, wherein the effective dose of the compound is from about 1 mg to about 5 mg.
 115. The method of claim 77, wherein the cell proliferation is a smooth muscle cell proliferation. 